Taco shell



FIG. 1 is a perspective view of design for a taco shell, showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a top view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a front elevational view thereof; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a taco shell, as shown and described. 